Bundle GeoTrust Global CA certificate

[mpdifran]

Describe the bug

APNs is still using the GeoTrust Global CA, which by default isn't trusted on Ubuntu. Apple is replacing the certificate they use on March 29th, 2021, but until then, would it be possible to include the certificate in this library?

More info here.

To Reproduce

• Send a push notification on Ubuntu, using Heroku for instance.
• An error occurs.

Expected behaviour

• The push notification should send successfully.

Environment

• Heroku Stack: heroku-18
• Vapor 4

[mpdifran]

This is working now that Apple have updated their certificate. Closing.